Separable end stop for slide fasteners



Oct. 8, 1940. F. ULRICH .SEPARABLE END STOP FOR SLIDE FASTENERS Filed April 5. 1938 ATTORNEY Patented oeeaiaio I I 2,216,794

UNITED STATES PATENT orrlca saPAnAnLa aim s'ror Fon. smiaras'rannas Frederick Ulrich, Bayonne, N. 1., assignor to Conmar Products Corporation, Bayonne, N. 1., a corporation of New Jersey Application April 5, 1938, Serial No. 200,067

1 Claims. ((124-205) This invention relates to slide fasteners, and some of the fabric of the tape sidewardly into more particularly to a separable end stop for use the apert and h f bric material itself acts at the lower end of slide fasteners which are as the locating P o et dowel W c feeto be fullyseparated, as for example, when used tively prevents longitudinal movement of the on coat sweaters, wind-breakers, or the like. body relative to the tape. I v

The primary object of my invention is t gen- Still another object is to provide means above erally improve fully separable slide fasteners, he sli r dy adapted to be received in he and more particularly the ,separablebottom end slider for helping locate the slider relative to stop therefor. In most popular form, these end h body during insertion of the D This m y stops comprise a body member secured t one consist of a short stud or sleeve secured to the of the tapes and having a socket dimensioned to head of tape immediately above e y. receive a pin formed on the ther tape, aid pin but I find that it is still better to make the stud being insertible through the slider while the or sleeve relatively long. say. q a in len th to slider is in lowermost position resting against the p in which e much of e length of the body of the end stop.. These bodies have the Stud is clamped Within the body- The Side I been made or sheetmetal and have also been walls of the stud are in such case cut w or v die-cast, but difilculty arises in either case. A notched at the aforesaid tang an p e of more particular object of the present invention the y, in Order t to t rfere with the funcis toovercome prior difliculties, which I do by tioning th re f, n n Order to p P providing a body for the separable end stop which neiitly Secure the tape, the stud and the; is made of solid stock rolled to form appropriate together- 1, channels therein and to give the same the desired T0 the aeeomplishmeht 0f the foregoing and cross-section. This rolled stock may be approu other objects as w hereinafter ppea priately treated and severed in a dieto form a y invention consists n the Slide eh d p e which is bent upwardly in U-shape, sai separable end stop elementsand their relation U-shaped piece being clamped to one of the one to the other. a hereinafter are more p tapes. The resulting product i stronger and ticularly described in the specification and sought cheaper to manufacture than either a die-cast be defined in the Claims- The p cat o body or a sheet metal body, and possesses further is accompanied by drawing, in w advantages over the sheet metal body, first, in Fig. 1 is a side elevation of a slide fastener presenting a more attractive appearance; and equipped with Seperebie end S ying second, in avoiding the necessity for using special features of y invention;

rivets, bent tongues, or the like, for holding the e 2 is a similar view taken in seetionthrough legs of the U against spreading. In fact, one the of the end p With t P n o ed feature and object of the present invention is to from the y; dispense with any such additional fastening 3 is a horizontal Section taken in the p ne means, and in accordance with the present inof the line of 1;

vention, the rolled stock is made heavy enough e 4 end 5 are explanatory of the method o and hard enough and is so shaped in crossrolling the material Stock for the b dy;

section, that the bend or bottom of the U is stiff 6 is e P View Of a Piece Of Stock ng enough to effectively prevent opening or separafabricated form the y;

tlon of th legs of t u, Fig. 7 is a transverse section taken in the While the inherent strength of the body is Diane the line 8 of Fig; 6 prior o n ng adequate to hold the same clamped tightly on the the tang; fastener, I prefer to guard against the possi- 3 is a Section taken in the P ane 0 the bility of longitudinal movement of the body line of a 6 after b n t e tan relative to the tape, for otherwise the body may 9 is a Section taken in the Plane 0! h under abuse or rough handling, be slid forcibly line of down ofi the end of the fastener. With this ob- F 10 is a s d vati n s w t manner ject in view, the body is providediwith a tang in which the body is bent up to finished U-shape; for engaging the tape. More specifically, I form Fig. 11 is a perspective view showing the cona tang on one side of the body and an aperture struction of the stud; and l on the other side of the body opposite the tang. Fig. 12 is. a perspective view explanatory of No attempt ismade to bring the tang itself into the construction at the bottom end of the pin.

the aperture, but instead it merely displaces Referringto the drawing, and particularly to most position, it bears against and rests on the upper edge of the body 26 of end stop l8, as is indicated by the broken line position of the slider shown in Fig. 2. At this time the elements 24 have all been disengaged from one another, and to complete the full opening or separation of the stringers I 2 and I4, it is merely necessary to remove the lower end of stringer I4 from body 26 and the slider i 6, as is clearly shown in Fig. 2.

To facilitate the insertion of the lower end of stringer l4 through slider l6 and into body 26, it is provided with a pin 28. This consists of a strip of sheet metal bent around head 22 and clamped in place. The lower end of tape 28 is preferably bent upwardly, as is indicated at 38 before applying the sleeve-like pin 28, thus strengthening and stiffening the material at the lower end of the stringer and guarding against unraveling of the threads at the bottom of folded edge 32. In order to avoid undue bulk within pin 28, the cords which are sewed at the edge of the tape to form the bead 22 are removed from the upwardly bent end 38 so that the material clamped within pin 28 includes two tape edges and only two cords, as is clearly shown at the right-hand part of Fig. 3, rather than four cords, as would be the case if the cords were not removed from the upwardly folded end 38. The outside dimension of the pin 28 is kept small enough to pass freely through the channel of the slider I6. The lower end of the pinvis preferably closed by metal tongues which protectively shield the tape, and the construction at this point will be' clearly evident from inspection of Fig. 12, in which it will be seen that the side walls of' pin 28 are provided with short inwardly turned tongues 34, while the inside wall is provided with a relatively long, outwardly turned tongue 36. Tongues 34 are preferably kept short so that tongue 36 will be disposed therebetween, and all three tongues together form a substantially enclosed metallic end for the pin 28.

The body 26 is preferably made of a piece of solid material formed with collateral channels.

A section through the material is clearly shown in Fig. 9, and it will be observed that there are two channels 38 and 48, channel 38 being larger than channel 48. The material is bent upwardly on a center or fold line indicated at 42 in Fig. 6. In Fig. .10 the piece of stock is shown preliminarily bent upwardly to V-shape, as is indicated in broken lines. The legs may at this time be at an angle of, say, 58". The bending step at this time is performed away from the fastener, and the piece of stock is then applied to stringer l2 and its legs or walls 44 and 46 are clamped together against the lower end of the stringer, thus locking the same in place. No special rivet or bent tongue is needed to hold the legs of the U in desired closed condition, for the section through the material is adequate in area and in its channel-shaped distribution of metal, to hold The slider l6 the legs stiffly in desired position, with no danger of spreading or separation.

The stock is preferably a continuous piece of metal which is rolledto the desired double channel shape. This is schematically indicated in Figs. 4 and 5, in which it will be seen that the piece of metal 58 is passed between rolls-52 and 54, thus working and hardening the metal in addition to squeezing the same into the desired channeled configuration.

The resulting continuous strip of rolled stock is severed into suitable lengths, as is indicated by the line of severance 56 in Fig. 6, and is then folded as was previously described in connection with Fig. 10.

The body 26 of the end stop may be clamped directly on the beaded edge of stringer l2, and I have made successful end stops with that construction. Insuch case the channel 48 is made considerably smaller relative to the channel 38 than is indicated in the present drawing.

The pin 28 is longer than the body 26'and projects thereabove even when inserted to the limit of its movement, as is indicated in Fig. 1. The lowermost elements 24 are disposed an appreciable distance above body 26 in order to make certain of opening-or separation of the elements when the slider I6 is moved to its lowermost position. The projection of pin 28 above body 26 helps strengthen the tapes and stiffen the same against undue flexibility between the pin and the lowermost element. For generally similar reasons, it is desirable to provide a stud 68 projecting upwardly somewhat above body 26. The slider moves over the stud 68 when in lowermost position, and the stud is therefore made small enough to enter the channel of the slider.

The stud may be short, but it is preferable to make it in the form of a long sleeve generally resembling the pin 28, said sleeve being received within and permanently secured to the body 26. A piece of sheet metal is folded about the beaded edge of stringer l2 and is securely clamped in place. The lower end may be finished by an inturned tongue 62, as is clearly shown in Fig. 11. The lower end of the tape 64 is preferably folded upwardly before applying the stud 68 to the tape, for reasons heretofore described in connection with the fold 38 on the other tape. In this case, as in the case of the fold 38, the cords forming the bead of the tape are preferably freed and cut away from the upwardly turned fold 64 in order not to add too great a bulk of material inside the stud. Only one tongue is provided at the lower end of stud 68 because it is not necessary to finish this end as well as the lower end of the pin 28, for the stud remains permanently locked within the body 26 and is not repeatedly inserted and removed, as is the case with pin 28. The stud is preferably made equal in length to the pin 28 so that the projection of the stud above the body is approximately equal to the projection of the pin above the body. The stud is preferably given a fiatsided or squared cross-section because this helps keep the slider l6 in approximately the same plane as the body 26 while inserting the pin 28 through the slider and body 26. The channel 48 rolled into the stock from which the body is formed is appropriately enlarged to receive the stud 68, but this channel is still substantially smaller than the channel 28, as will be clear from Fig. 9, so that the body 26 may be clamped hard against stud 68 in order to securely lock the tape, the stud and the body together, while at the same time providing ample clearance in channel-II for free insertion or removal of pin 28.- .It will because under forcible or abusive use of the fastener, the body 26 might be slid oil. the stud 60 even without appreciable opening up or spreading of the walls 44 and 46 of the body.

To accomplish the desired results, I provide a tang 10' formed integrally with and projecting inwardly from the wall 44 of the body. An aperture 12 may be cut through the other wall 46 of the body at a point opposite tang ID. The tang Ill is intentionally made short and no attempt is made to force the same through the fabric orinto the aperture 12. the tape material sidewardly and jams the same into the aperture I2, as will beclearly understood from inspection of Fig. '3 of the drawing. In this way the fabric forced into aperture 12 acts as a locating member or detent and effectively prevents longitudinal movement of body 26 relative to the'tape.

The construction as so far described would be applicable whether or not stud 60 is employed. When the studis employed, as in the present case, it is preferably notched or cut away, as is indicated at 14 in Figs. 2 and 11.: The stud is cut.

away in this manner on both sides, and tang 1|! passes through the notch on one side, while the displaced'tape material passes through the notch I on the other side,'as is shown in Fig. 3.

The method of making the tang I0 and aperture 12 will be clear from examination of Figs. 6

through -9 of the drawing. In making the tang 10, the'fiange I6 is preliminarily cut away at 18, leaving a reduced amount of material, as will be clearfrom inspection of Fig. 7. The remaining material is then incised and bent to form the tang 10, as will be clear from inspection of Fig. 8.

The aperture 12 is cut through the stock by a simple punching operation. It will be understood that the operations here described for forming the tang l0 and aperture 12 may be and preferably are performed in a suitable die which operates on the stock while i is still a continuous wire or ribbon, the final operation being to sever and method of manufacture of my improved sep arable bottom end stop, as well as the many advantages thereof, will be apparent from the foregoing detailed description. It will also be apparent that while I have shown and described my invention in a preferred form, changes and modifications may be made in the structure disclosed,

without departing from the spirit of the invention'deflned in the following claims.

Instead, the tang Ill displaces channel being dimensioned to freely receive the aforesaid pin, and .said smaller channel being clamped on the other tape, the cross-section of said channel-shaped material being such that the body is stiff enough at the bend to hold the sides of the body in the desired U-shape without necessitating the use of additional fastening means to keep the sides of the U from spreading apart, and means to anchor the body on the tape, said means including a short, blunt tang formed integrally with and bent inwardly from one side of said body, and an aperture cut through the opposite side of said body at said tang, whereby said tangforces the material of said tape into said aperture.

2. A separable bottom end stop for a fully separable slide fastener comprising tapes having interlockable ulements secured along the edges thereof, a slider, and a separable bottom end stop, said stop including a sheet metal member folded about the edge of one of said tapes at the lower end thereof and acting as a pin, a

sheetmetal member folded about the edge of the other of said tapes at the lower end thereof and acting as a stud, and a body comprising a.

piece of metal with parallel collateral channels folded upwardly to U-shape, one of said channels being smaller than the other, said larger channel being dimensioned to freely receive the aforesaid pin, and said smaller channel being clamped on the aforesaid stud, the upper end of said stud projecting upwardly above 'the'body' to receive the slider, and meansto anchor the i body on the tape, said means including a short,

blunt tang formed integrally with and,bent inwardly from one side of said body, an aperture cut through the other side of said body opposite said tang, and said stud being cut away on both sides at said tang and aperture, whereby saidl tang forces the material of the tape into said aperture.

3. A separable bottom end stop for a fully separable slide fastener comprising tapes having interlocking elements'secured along the edges thereof, a slider, and a separable bottom end stop, said stop including a pin at the lower end of one tape, and a piece of rolled metal of variable-thickness channeled cross section fold ed to U-shape and clamped on the edge of the other tape, the inner face of said 'metal piece having a pair of continuous collateral channels extending along the entire inner surface of the U one of said channels receiving the pin, and the other being clamped on the other tape.

4. A separable bottom end stop for a fully separable slide fastener comprising tapes having interlocking elements secured along the edges thereof, a slider, and a separable bottom end stop, said stop including a pin at the lower end of one tape, and a piece of rolled metal of variable-thickness channeled cross section folded to U-shape' and clamped on the edge of the other tape, the inner surface of said metal piece having a pair of continuous collateral Hi channels extending along the entire inner surface of the U, one of said channels being smaller than the other, said larger channel being dimensioned to freely receive the aforesaid pin, and said smaller channel being clamped on the edge of the other tape, the outer surface of said metal piece having a configuration from the channeled inner surface.

5. A separable bottom end stop for a fully separable slide fastener comprising tapes having interlocking elements secured along the edges thereof, a slider, and a separable bottom end stop, said stop including a sheet metal member folded about the edge of one of said tapes at the lower end thereof and acting as a pin, a substantially similar sheet metal member folded about the edge of the other of said tapes at the lower end thereof and acting as a stud, and a piece of rolled metal of variable-thickness channeled cross section folded to U-shape and clamped on the aforesaid stud, the inner face of said metal piece having a pair of continuous collateral channels extending along the entire inner surface of the U, one of said channels being smaller than the other, said larger channel being dimensioned to freely receive the aforesaid pin, and said smaller channel being clamped on the aforesaid stud, the outer surface of said metal piece having a configuration different from the channeled inner surface.

6. A separable bottom end stop for a fully separable slide fastener comprising tapes having interlocking elements secured along the edges thereof, a slider, and a separable bottom end stop, said stop including a pin at the lower end of one tape, and a piece of rolled metal of variable-thickness channeled cross section folded to U-shape and clamped on the edge of the other tape, the inner face of said metal piece having a pair of continuous collateral channels extending along the entire inner surface of the U, one of said channels receiving the pin, and the other being clamped on the other tape, and means to anchor the metal piece on the tape, said means including a tang formed integrally with and bent inwardly from one side of the metal piece.

7. An end stop housing of a separable bottom stop for a fully separable slide fastener, said housing comprising a rolled metal member folded to U-shape, said U comprising substantially parallel legs and a. connecting base portion, the inner face of the legs and base portion having a pair of collateral channels, the channels continuously extending along the inner surface of the legs and across the connecting base portion of the U, the outer surface of said hous ing having a configuration different from the channeled inner surface.

FREDERICK ULRICH. 

